METHOD AND APPARATUS FOR MOTION SENSING WITH INDEPENDENT GRIP DIRECTION

• US 20120279296A1
• Filed: 05/04/2012
• Published: 11/08/2012
• Est. Priority Date: 05/06/2011
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Taylor, Brandon Thomas, Lee, Jong-In
• Application Number:
  US13/464,776
• Publication Number:
  US 20120279296A1
• Time in Patent Office: Days
• US Class Current: 73/382.R
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors

Abstract

A motion sensing technique. A method for motion sensing of a motion sensing apparatus include determining a gravity direction, determining an actual motion, and determining a current motion based on the determined gravity direction, the determined actual motion direction, and a previous motion direction.

Claims

1. A method for motion sensing of a motion sensing apparatus, the method comprising:

determining a gravity direction;

determining an actual motion; and

determining a current motion based on the determined gravity direction, the determined actual motion direction, and a previous motion direction.

2. The method of claim 1 further comprising:

performing an operation based on the current motion.

3. The method of claim 1 further comprising:

updating the gravity direction.

4. The method of claim 1 further comprising:

before determining the gravity direction, performing a control process to allow a determination value of a sensor to be in a reference range.

5. The method of claim 4, wherein the sensor includes at least one of an accelerator sensor and a gyro sensor.

6. The method of claim 1, wherein determining the current motion based on the determined gravity direction, the determined actual motion direction, and the previous motion direction comprises:

using equations of;

G_P=F_P(G_t-1),

where G_P is a motion prediction vector at a current time, F_P is a prediction function, and G_t-1 is a motion vector at a previous time; and

G_P=F_E(G_P,measurement),

where G_t is a motion vector at a current time, F_E is a motion determination function, G_P is motion prediction vector at a current time, and ‘

measurement’

is a determination value obtained by determining a motion.

7. The method of claim 1, wherein determining the current motion comprises:

calculating the current motion based on;

G_P=F_P(G_t-1),

where G_p is a motion prediction vector at a current time, F_P is a prediction function, and G_t-1 is a motion vector at a previous time

14. The apparatus of claim 7, wherein to determine the current motion, the motion determination unit is further configured to

calculate the current motion based on:

G_P=F_P(G_t-1),

where G_P is a motion prediction vector at a current time, F_P is a prediction function, and G_t-1 is a motion vector at a previous time

8. An apparatus for motion sensing, the apparatus comprising:

a Radio Frequency (RF) modem configured to communicate with another apparatus; and

a motion determination unit configured to;

determine a gravity direction,

determine an actual motion, and

determining a current motion based on the determined gravity direction, the determined actual motion direction, and a previous motion direction.

9. The apparatus of claim 8 further comprising:

an application program manager configured to perform an operation based on the current motion.

10. The apparatus of claim 8, wherein the motion determination unit is further configured to update the gravity direction.

11. The apparatus of claim 8, wherein before determining the gravity direction, the motion determination unit is further configured to perform a control process to allow a determination value of a sensor to be in a reference range.

12. The apparatus of claim 11, wherein the sensor includes at least one of an accelerator sensor and a gyro sensor.

13. The apparatus of claim 8, wherein to determine the current motion based on the determined gravity direction, the determined actual motion direction, and the previous motion direction, the motion determination unit is further configured to use equations of:

G_P=F_P(G_t-1),

where G_P is a motion prediction vector at a current time, F_P is a prediction function, and G_t-1 is a motion vector at a previous time; and

G_P=F_E(G_P,measurement),

where G_t is a motion vector at a current time, F_E is a motion determination function, G_P is motion prediction vector at a current time, and ‘

measurement’

is a determination value obtained by determining a motion.

15. A system for motion sensing, the system comprising:

a first apparatus; and

a second apparatus configured to communicate with the first apparatus, wherein the second apparatus is further configured to;

determine a gravity direction,

determine an actual motion, and

determining a current motion based on the determined gravity direction, the determined actual motion direction, and a previous motion direction.

16. The system of claim 15, wherein the second apparatus is further configured to perform an operation based on the current motion.

17. The system of claim 15, wherein the second apparatus is further configured to update the gravity direction.

18. The system of claim 15, wherein before determining the gravity direction, the second apparatus is further configured to perform a control process to allow a determination value of a sensor to be in a reference range.

19. The system of claim 18, wherein the sensor includes at least one of an accelerator sensor and a gyro sensor.

20. The system of claim 15, wherein to determine the current motion based on the determined gravity direction, the determined actual motion direction, and the previous motion direction, the second apparatus is further configured to use equations of:

G_P=F_P(G_t-1),

where G_P is a motion prediction vector at a current time, F_P is a prediction function, and G_t-1 is a motion vector at a previous time; and

G_P=F_E(G_P,measurement),

where G_t is a motion vector at a current time, F_E is a motion determination function, G_P is motion prediction vector at a current time, and ‘

measurement’

is a determination value obtained by determining a motion.